Double Muon Trigger efficiency in 2012 data

Method and results for the computation of the efficiency of double muon triggers are presented in this report. Efficiencies for the two main HLT double muon triggers used in 2012 ($Mu17\_Mu8$ and $Mu17\_TkMu8$) are computed on the basis of data collected at the end of the LHC Run-1 period (Run2012D dataset). Moreover, a breakdown of the intermediate results from each step of the efficiency measurement method, as well as data/montecarlo scale-factor ratios, are presented for the $Mu17\_TkMu8$ trigger.